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dc.contributor.authorYusami, Riyan
dc.date.accessioned2022-08-08T12:11:06Z
dc.date.available2022-08-08T12:11:06Z
dc.date.issued2022-08
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dc.identifier.urihttps://library.universitaspertamina.ac.id//xmlui/handle/123456789/6346
dc.description.abstractPulau Sumatra-Jawa merupakan pulau yang berada di zona subduksi lempeng Indo-Australia terhadap Eurasia. Struktur geologi pada Pulau Sumatra yaitu Sesar Semangko, sedangkan Pulau Jawa yaitu Busur Sunda. Terdapat aktivitas vulkanik aktif, seperti pegunungaan bukit barisan yang menjadikan Pulau Sumatra-Jawa rentan erupsi gunung berapi. Penelitian dilakukan di Danau Toba, Sumatra Utara dan Gunung Merapi, Jawa tengah dengan menggunakan data gempa dari stasiun IRIS. Tujuan penelitian yaitu menginvestigasi amplitudo dalam mengetahui keberadaan reservoir fluida (magma) dan menganalisis vulkanik wilayah Danau Toba dan Gunung Merapi dengan metode Low Frequency Passive Seismic (LFPS) dengan memanfaatkan atribut, seperti Vertical-to-Horizontal Spectral Ratio (VHSR), Power Spectral Density (PSD) Z, spektrum amplitudo komponen Z, analisis azimuth, dan dip yang digunakan sebagai indikator untuk menghubungkan reservoir fluida di bawah permukaan dengan melihat kurva spektrum. Nilai spektrum amplitudo puncak dalam rentang 1-6 Hz digunakan untuk mengidentifikasi anomali energi frekuensi rendah dalam bandwidth dari mikrotremor yang disebabkan oleh keberadaan reservoir (Dangel et al., 2003). Berdasarkan hasil penelitian dari analisis seluruh parameter atribut yang diperoleh, anomali spektrum amplitudo maksimum VHSR, maksimum amplitudo PSD Z, spektrum amplitudo komponen Z, dan analisis polarisasi menunjukkan bahwa lokasi dengan potensi reservoir fluida bawah permukaan tertinggi berada di Barat Laut-Tenggara, Pulau Samosir, dan di sekitar Danau Toba. Sedangkan pada Gunung Merapi lokasi potensi keberadaan reservoir fluida berada di sepanjang wilayah sisi Barat-Timur-Selatan Gunung Merapi dan bersifat dinamis. Hasil tersebut mendukung penelitian sebelumnya. Untuk aktivitas vulkanik di Gunung Merapi relatif lebih tinggi (aktif) daripada Danau Toba yang ditunjukkan dengan nilai spektrum amplitudo yang lebih tinggi.en_US
dc.language.isootheren_US
dc.publisherRiyan Yusamien_US
dc.subjectDanau Toba, Gunung Merapi, Reservoir Fluida, Vertical to Horizontal Spectral Ratio, Power Spectral Density, Low Frequency Passive Seismic, Azimuth, Dipen_US
dc.titleAnalisis Perbandingan Amplitudo Menggunakan Metode Low Frequency Passive Seismic (LFPS) di Sekitar Danau Toba, Sumatra Utara dan Gunung Merapi, Jawa Tengahen_US
dc.typeThesisen_US


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